Not seeing much controversy below, so that's good!
Quote:
A. Goldman Sachs initially financed Crystal Technologies, an early provider of cloud computing services, but they withdrew the funding
Very clear issue with pronoun agreement: "they", in theory, should refer to Goldman Sachs, but the company itself is singular. Plus, that initial modifier makes it sound like Goldman went bankrupt in 2008, and it's clear from the sentence that Crystal Technologies was the firm that went under. Eliminate (A).
Quote:
B. Crystal Technologies, an early provider of cloud computing services, was initially financed by Goldman Sachs, which withdrew the funding
Looks fine to me! The pronoun and modifier placement issues in (A) have been removed, and the phrase beginning with "which" modifies "Goldman Sachs," so no worries there. Keep (B).
Quote:
C. Crystal Technologies, an early provider of cloud computing services, had been initially financed by Goldman Sachs and had its funding withdrawn
This doesn't seem too horrible, but the parallelism is funky. It's not wrong, exactly, but it's definitely not the clearest thing ever: "Crystal Technologies had been initially financed... and had its funding withdrawn." No reason, really, for the parallelism, and there's also no great reason for saying the company "had its funding withdrawn" instead of saying that Goldman withdrew the funding.
Plus, that "its" is a little bit far from the antecedent. That's not a DEFINITE crime, but it's not ideal, either. (B) is clearly better than (C).
D. Goldman Sachs initially financed Crystal Technologies, an early provider of cloud computing services, withdrawing the funding
Same modifier placement issue as in (A) -- it sounds like Goldman went bankrupt, and that's not right. I also don't love that "withdrawing" is a modifier here -- it's not WRONG, but (B) seems clearer, since it emphasizes that Goldman was the entity that withdrew the funding. Eliminate (D).
Quote:
E. Crystal Technologies, an early provider of cloud computing services, was initially financed by Goldman Sachs and withdrawn
Ha. More crappy "fake parallelism." "Withdrawn" is parallel to "financed", I suppose, but that doesn't make sense: "Crystal Technologies... was initially withdrawn..." Nope. (E) is out, and (B) is our winner.